740881 has 4 divisors (see below), whose sum is σ = 745200. Its totient is φ = 736564.

The previous prime is 740849. The next prime is 740891. The reversal of 740881 is 188047.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 188047 = 47 ⋅4001.

It is a cyclic number.

It is not a de Polignac number, because 740881 - 2⁵ = 740849 is a prime.

It is a super-2 number, since 2×740881² = 1097809312322, which contains 22 as substring.

It is a Duffinian number.

740881 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (740801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1891 + ... + 2248.

It is an arithmetic number, because the mean of its divisors is an integer number (186300).

2⁷⁴⁰⁸⁸¹ is an apocalyptic number.

It is an amenable number.

740881 is a deficient number, since it is larger than the sum of its proper divisors (4319).

740881 is a wasteful number, since it uses less digits than its factorization.

740881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4318.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 740881 is about 860.7444452333. The cubic root of 740881 is about 90.4862976925.

The spelling of 740881 in words is "seven hundred forty thousand, eight hundred eighty-one".